Arsenic

ingested (toxin) - 500 gp
ToxinDeadly and scentless poison in the form of a colorless liquid.
A creature subjected to this poison must make a DC 15 Constitution saving throw, becoming poisoned for 1 hour and taking 13 (3d8) poison damage on a failed save, or half as much damage on a successful one.
Recueil des poisons d´AideDD
  1. DnD 5e Poisons › Arsenic